<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
		<script type="text/javascript">
			var obj={};
			obj.x=0;
			obj.y=1;
			obj.z=2;
			obj.a=3;
			obj.b=19;
			console.log(obj);
			console.log(obj.a);
		</script>
	</head>
	<body>
	</body>
</html>
